Infants do not sleep at night for six months consider with living habits, environmental factors, calcium deficiency and various other factors. 1. Lifestyle, if the baby sleeps too long during the day, it may affect the sleep at night, so the symptoms of non-sleeping at night will appear. 2. Environmental factors, if the environment is noisy or bright during sleep, it may affect the baby’s sleep and cause such symptoms. Meanwhile, if the temperature is too high or too low, it will also affect the baby’s sleep and the symptoms of not sleeping at night. 3. Calcium deficiency, if the baby lacks calcium may lead to crying, excessive sweating and other symptoms, and may also be accompanied by restless sleep. There may be other reasons why a baby does not sleep at night for six months, so it is recommended that you go to the hospital in time for a complete examination to determine the cause of the illness and then give targeted treatment under the guidance of the doctor.